you can attach them to the dragons via "change" button on their page, then you can bond with them once per day and get a bit of treas and later chests(click on the heart symbol to bond)
um well you can breed your two first ones if you want but i don't recommend that unless you want fodder lol... try looking in the auction house once you have some treasure and stuff or go to your flight's forum whichever you joined they might give away to newbies